Been using OneDrive personally as a paying customer for over a year. Put my reputation on the line at work by championing Office365 over Google for Business (also paying customers there).

How in the #*!! does Microsoft break *forward* compatibility? I could almost understand if the problem was dropping support for old file systems. But why in the name of all that is good would you drop support for new file systems? NTFS is over 20 years old for crying out loud.